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<h3>QTopoCalib - Command buttons</h3>

The command buttons are grayed out when they are not active.
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<td><img src="../images/buttons/filenew2.png"></td>
<td><img src="../images/buttons/filenewoff2.png"></td>
<td><b>Clear</b></td>
<td>Clear the calibration data.<br>
<font size=-1><i>NOTE. To avoid a hard data-recovery
you should save the calibration data as soon as you download
them from the DistoX.</i></font></td>
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<td><img src="../images/buttons/fileopen2.png"></td>
<td>&nbsp;</td>
<td><b>Open</b></td>
<td>Read the calibration data from a file.<br>
<font size=-1><i>NOTE. The current calibration data
are overwritten. Be careful with this: you might overwrite
data downloaded from the DistoX and not saved yet.</i></font></td>
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<td><img src="../images/buttons/filesave2.png"></td>
<td><img src="../images/buttons/filesaveoff2.png"></td>
<td><b>Save</b></td>
<td>Write the calibration data to a file.<br>
<font size=-1><i>This is the first thing you should do whenever you download a set
of calibration data from the DistoX.</i></font></td>
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<td><img src="../images/buttons/filedata2.png"></td>
<td>&nbsp;</td>
<td><b>Download</b></td>
<td>Download the calibration data from the DistoX.</td>
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<td><img src="../images/buttons/fileeval2.png"></td>
<td><img src="../images/buttons/fileevaloff2.png"></td>
<td><b>Compute</b></td>
<td>Compute the calibration.<br>
<font size=-1><i>The calibration error and coefficients are shown
in a dialog box.</i></font></td>
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<td><img src="../images/buttons/filecover2.png"></td>
<td><img src="../images/buttons/filecoveroff2.png"></td>
<td><b>Coverage</b></td>
<td>Display the directions coverage of the calibration data.</td>
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<td><img src="../images/buttons/filecomment2.png"></td>
<td><img src="../images/buttons/filecommentoff2.png"></td>
<td><b>Description</b></td>
<td>Write or change the description of the calibration.<br>
<font size=-1><i>The description is useful to later remind you about this
calibration.</i></font></td>
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<td><img src="../images/buttons/filetoggle2.png"></td>
<td>&nbsp;</td>
<td><b>Mode</b></td>
<td>Toggle the DistoX between normal mode and calibration mode.<br>
<font size=-1><i>The resulting DistoX mode is displayed in a dialog box.</i></font></td>
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<td><img src="../images/buttons/fileread2.png"></td>
<td>&nbsp;</td>
<td><b>Read</b></td>
<td>Read the calibration from the DistoX, and display it.</td>
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<td><img src="../images/buttons/filewrite2.png"></td>
<td>&nbsp;</td>
<td><b>Write</b></td>
<td>Write the calibration to the DistoX.<br>
<font size=-1><i>You can backup the old DistoX calibration if you need.</i></font></td>
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<td><img src="../images/buttons/filehelp.png"></td>
<td>&nbsp;</td>
<td><b>Help</b></td>
<td>Open the help browser.</td>
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<td><img src="../images/buttons/filequit2.png"></td>
<td>&nbsp;</td>
<td><b>Exit</b></td>
<td>Exit QTopoCalib.</td>
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